Boiler-furnace



No. 624,786. Y Patented May 9, I899. E. G. GEBMER. BOILER FURNACE.

(Appl t fildJu 17 1898) (No Model.)

I 1 L r w u I e m A F (K I If. I L...z. W i .MW I fl B L i WITNESSES.-

NITED STATES ATENT OFFICE.

EDWARD G. GERMER, OF ERIE, PENNSYLVANIA.

BOILER-FURNACE.

SPECIFICATION forming part of Letters Patent No. 624,786, dated May 9,1899. Application filed June 17, 1898. Serial No. 683,696. (No model.)

. hereby declare the following to be a full, clear,

and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to the letters ofreference marked thereon, forming part of this specification.

This invention relates to improvements in boiler-furnaces; and itconsists,substantially, in constructing a series of vertical flues inthe sides of the furnace and front of the bridgewall extending frombelow the grate-bars upward a short distance above the top of the bed offuel on the grate-bars and having the fronts thereof provided withnarrow slots through which the gases generated in the fuel pass intosaid fines and are there intermixed with air passing up therethroughfrom below the grates and pass out of the upper portions of the slots insaid fines, so as to be burned at or just above the surface of the bedof fuel on the grate-bars, whereby I am enabled to secure a much largerconsumption of these gases than is possible in boiler-furnaces takingtheir supply of air through the interstices between thegrate-bars alone.I

The construction and operation of this in vention are hereinafter fullysetforth and described, and illustrated in the accompanying drawings, inwhich Figure l is a vertical section of a boilerfurnace embodying myinvention. Fig. 2 is horizontal section of the same on the line w a; inFig. 1, looking in the direction of the arrows. Fig. 3 is an enlargedperspective View of a section of the same, showing the constructionthereof. Fig. 4c is a sectional view of a double-boiler furnacesubstantially on the plane of the line a: as in Fig. 1.

In the drawings thus illustrating myinvention, A is a boiler, and B asection of the setting thereof, 0 the bridge-wall, D the firebox, E thefire-box doors, F the grate-bars, G the ash-pit, and H the ash-pitdoors, all of which are of usual construction, except in that I build inthe lining of the sides d of the fire-box D and in the front c-of thebridgewall 0 a series of vertical fines I, which extend upward from apoint a little below the bottoms of the grate-bars F to a point a littleabove the top of the bed of fuel J on the gratebars F. In the fronts ofthese flues are narrow vertical slots I, which extendthe entire lengthof the fiues I, and at the lower ends of the fines I there are inclinedopenings I into the ash-pit G, through which any ashes passing into theflues I through the slots I therein pass down into the ash-pit G. Thetops of the fines I and the slots I are closed, so

thatthe slots 1 are the only communication with the flues I, except theinclined openings I at the lower ends thereof, as is clearlyillustratedin the enlarged Fig. 3. These fines and the slots in the fronts thereofI prefer- 7o ably make of fire-brick molded in the proper shapetherefor, so as to be laid up, as illustrated in Fig. 3. I can, however,make the flues of metal and set them in the walls of the fire-box, usingordinary fire-brick and build ing the metal fines into the walls of thefirebox. I prefer, however, to make them of brick molded to the propershape and laid up as illustrated in Fig. 3.

In operation air passes up from the ash-pit through the fines I, and thegases from the coal being burned also passes into the fines I throughthe slots 1, and as the gases and air intermixed pass out of the upperparts of the slots I over the top of the coal they are burned, whichflame also assists to consume the remaining gases arising from the topof the coal through the surplus air passing up through the dues I andout over the surface of the coal.

In Fig. 4 I show a fire-box with a central longitudinal wall, which onlyextends up far enough to contain the flues I and which is adapted foruse in wide fire-boxes where there is not enough air supplied throughthe flues 5 in the sides of the fire-box and front of the bridge-wall.

Having thus shown and described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, 10o 1s q 1. Thecombination in a boiler-furnace,of side walls having a series ofvertical flues therein extending from below the grate-bars thereof to apoint soinewhat above the top of the coal on the grate-bars, said flueshaving narrow vertical slots in the fronts thereof extending into saidflues through their entire length, substantially as and for the purposeset forth.

2. The combination in a boiler-furnace, of side walls having a series ofvertical flues therein extending from below the grate-bars thereof to apoint somewhat above the top of the coal on the grate-bars, said flueshaving I narrow vertical slots in the fronts thereof ex-. tending intosaid flues throughout their entire length, with a bridge-wall havinglike slotted flues in the front thereof, substantially as and for thepurpose set forth.

In testimony whereof I affix my signature in presence of twowitnesses'EDWARD G. GERMER. Witnesses:

FRED EINFELDT, H. J. CURTZE.

